Trend for Precision Soil Testing % Zone or Grid Samples Tested compared to Total Samples
%Zone or Grid Samples Tested Compared to Conventional Whole Field Composite Samples in 2016
AGVISE Laboratories %Zone or Grid Samples – Northwood laboratory 1997 - 2016 % Grid or Zone Samples Tested Compared To Conventional Whole Field Composite Samples Tested
Average Soil Nitrate following Wheat in 2016 MB Fall 2016 Samples 37 36 (lb/a 0-24” samples) 37 32 45 19 45 39 43 30 34 38 36 36 ND 60 43 45 41 45 49 55 MN 44 42 SD 43 50
Average Soil Nitrate Following “Wheat” 1986 – 2016 (0-24” lb/a) Nitrate-N (0-24” lb/a)
Soil Nitrate Variability Between Fields Following “WHEAT” in 2016
Average Soil Nitrate Following “Wheat” (1986-2016) “Deep N” (24-48” lb/a) Nitrate-N (0-24” lb/a)
Average Soil Nitrate Following “Barley” 1986 - 2016 Nitrate-N (0-24” lb/a)
Soil Nitrate Variability Between Fields Following “Barley” in 2016
Average Soil Nitrate Following “Sunflower” 1986 - 2016 Nitrate-N (0-24” lb/a)
Soil Nitrate Variability Between Fields Following “Sunflower” in 2016
Average Soil Nitrate Following “Drybeans” 1986 - 2016 Nitrate-N (0-24” lb/a)
Soil Nitrate Variability Between Fields Following “Dry Beans” in 2016
Average Soil Nitrate Following “Sugarbeets” 1986 - 2016 Nitrate-N (0-24” lb/a)
Soil Nitrate Variability Between Fields Following “Sugarbeet” in 2016
Average Soil Nitrate Following “Fallow” 1986 - 2016 Nitrate-N (0-24” lb/a)
Soil Nitrate Variability Between Fields Following “Fallow” in 2016
Average Soil Nitrate following Soybean in 2016 Fall 2016 samples MB 23 30 (lb/a 0-24” samples) 29 25 36 28 38 35 24 29 29 31 25 ND 27 29 28 22 27 32 MN 30 28 SD 30 31 24 27
Average Soil Nitrate Following “Soybeans” 1995 - 2016 Nitrate-N (0-24” lb/a)
Soil Nitrate Variability Between Fields Following “Soybeans” in 2016
Average Soil Nitrate following Corn in 2016 Fall 2016 samples MB (lb/a 0-24” samples) 28 47 53 41 37 51 ND 50 53 61 48 52 60 75 101 MN 51 SD 37 63 33 53
Average Soil Nitrate Following “Corn” 1997 – 2016 (Northwood Laboratory) Nitrate-N (0-24” lb/a)
Soil Nitrate Variability Between Fields Following “Corn” in 2016
% Soil Samples with Phosphorus less than 10 ppm Fall 2016 samples MB 39% (0-6” samples) 39% (Olsen P test) 55% 60% 14% 73% 31% 23% 21% 71% 67% 71% 47% 69% 54% ND 45% 48% 51% 59% 62% 26% 61% 38% 50% MN 37% SD 41% 39% 49% 37% 35%
% Soil Samples with Potassium less than 150 ppm MB Fall 2016 samples 25% 13% (0-6” samples) 26% 26% 21% 6% 13% 10% 26% 5% 4% 1% 13% 36% 72% ND 8% 19% 59% 5% 41% 5% 46% 2% 5% 32% MN 33% SD 43% 1% 5% 35% 43%
% Soil Samples with Zinc less than 1.0 ppm MB Fall 2016 samples 47% 58% (0-6” samples) 62% 52% 26% 76% 44% 31% 33% 73% 81% 82% 41% 65% 34% ND 49% 70% 21% 77% 58% 53 19% 75% 44% 51% MN 27% SD 44% 57% 43% 38% 26%
% Soil Samples with Sulfur less than 15 lb/a MB Fall 2016 samples 16% 23% (0-6” samples) 16% 12% 9% 20% 25% 16% 16% 49% 21% 27% 13% 21% 52% ND 32% 76% 40% 21% 43% 52% 80% 67% 34% 49% MN 65% SD 90% 68% 44% 68% 88%
% Soil Samples with %OM less than 3.0% MB Fall 2016 Samples 8% 10% (0-6” samples) 21% 11% 34% 22% 34% 24% 25% 71% 33% 45% 26% 28% 37% ND 30% 60% 76% 29% 27% 35% 25% 55% 28% 13% MN 10% SD 9% 25% 29% 7% 4%
% Soil Samples with Chloride less than 40 lb/a MB Fall 2016 Samples 44% 39% (0-24” samples) 42% 63% 24% 80% 55% 37% 41% 84% 61% 69% 67% 45% 75% ND 64% 85% 54% 59% 86% 92% 90% 52% MN 62% 86% SD 61% 83% 75%
% Soil Samples with Copper less than 0.5 ppm MB Fall 2016 samples 12% 7% (0-6” samples) 28% 5% 31% 17% 18% 16% 22% 6% 15% 3% 23% 36% 36% ND 11% 56% 10% 30% 15% 14% 34% 16% 7% MN 6% 10% SD 6% 6% 4% 1%
% Soil Samples with Boron less than 0.4 ppm MB Fall 2016 samples 2% 1% (0-6” samples) 3% 1% 6% 2% 9% 2% 11% 3% 4% 2% 7% 8% 27% ND 4% 17% 34% 84% 4% 11% 57% 16% 13% 9% MN 14% SD 10% 36% 9% 11% 37%
% Soil Samples with Soil pH greater than 7.3 MB Fall 2016 samples 62% 94% (0-6” samples) 79% 72% 91% 69% 57% 73% 78% 72% 75% 54% 73% 96% 45% ND 43% 8% 43% 64% 78% 27% 47% 11% 17% MN 40% 55% SD 43% 16% 28% 30% 21%
% Soil Samples with Soil pH less than 6.0 MB Fall 2016 samples 2% 0% (0-6” samples) 4% 4% 0% 1% 15% 1% 7% 2% 1% 4% 6% 1% 11% ND 14% 34% 16% 3% 4% 13% 16% 17% 16% MN 9% 19% 13% SD 16% 18% 43% 10% 35%
% Subsoil Samples with pH less than 7.0 MB Fall 2016 samples 2% 1% (0-6” samples) 4% 3% 0% 2% 16% 1% 3% 1% 1% 1% 3% 1% 5% ND 3% 52% 5% 2% 1% 6% 9% 17% 9% MN 3% 3% 13% SD 29% 10% 6% 19% 19%
% Soil Samples with Carbonate greater than 5.0% MB Fall 2016 samples 30% 56% (0-6” samples) 25% 22% 19% 2% 14% 8% 33% 11% 7% 4% 17% 24% 5% ND 9% 11% 11% 26% 4% 10% 0% 1% MN 12% 26% SD 4% 2% 1% 10%
% Soil Samples with Salts greater than 1.0 MB Fall 2016 Samples 18% (0-6” samples) 13% 20% 19% 8% 4% 12% 20% 3% 15% 8% 24% 11% 6% ND 12% 4% 3% 19% 7% 2% 3% 19% MN 8% 3% SD 1% 2% 9% 1% 2%
North Dakota & NW Minnesota % Samples Testing with Salts greater than 1.0 582 Grand Forks 567 TRF 587 Minot 1:1 salt method – expressed as mmhos/cm
South Dakota - % Samples Testing with Salts greater than 1.0 1:1 salt method – expressed as mmhos/cm
Zip Code Areas For Soil Test Summaries ND MN SD